Nordex Energy Gmbh

Thomas Frese

Gerd Hose

Eberhard Voss

Matthias Thulke

Lars-Ulrich Wiese-Muller

Gunnar Schmidt

Lars-Ulrich Wiese-Müller

The present invention is related to a method for controlling a wind energy plant, with a nacelle disposed on a tower and with a rotor with at least one rotor blade, the blade adjustment angle of which can be adjusted by means of a blade adjustment equipment. The objective to provide a reduction of the loads acting on the plant when there is a malfunction of the blade adjustment equipment is resolved according to the present invention in that the function of the blade adjustment equipment is monitored, and when an error of the blade adjustment equipment occurs, the nacelle is rotated from an operating position into a rest position, in which there is a flow of the wind against the surface extended by the at least one rotor blade () in a rotation of the rotor which is reduced with respect to the operating position.

Method for controlling a wind energy plant

A method for the operation of a wind energy plant with a rotor, which transfers a driving moment to a generator via a drive train, wherein the generator provides a pre-settable generator moment acting opposite to the driving moment and is connectable to a grid, characterised in that after a sudden voltage change in the grid, the generator moment is controlled depending from the phase position of a torsional vibration of the drive train.

Method for the operation of a wind energy plant at sudden voltage changes in the grid

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Norderstedt, Germany

Thomas Frese